Web roll braking mechanism



Jan. '8, 1935. H. FANKBONER 1,987,329

WEB ROLL BRAKING MECHANISM Filed Sept. 25, 1931 Patented Jan. 8, 1935PATENT ()FFICE WEB BRAK NG Harland Fankboner, Chicago, Ill., assignor toThe .Goss Printing Press Company, Ghicago, 111., a

corporation of Illinois Ap l ation Se tem e 2 1931 Se a N 64 530 3Claims.

trneh s r a gement c mb n t s ehs mhm emeht he e n s wn and de ri Theaccompanying drawing, referred to herein and himd l tm a P h x efis ustates on mbodim nt o t tent on and toget e wi he de cri ti n se ves t exla n the prin i le of the invention.

The si l fi e of th d aw i a sid e ere ion o t p e e t e erre and l u tt t e emb diment the n ent onhree ht hv nti n has hr it o t th plrov.sion f a v l an improved b aking m s enism controlling t e r tat on o erol s and the tension of the web fed therefrom produce a more positivecontrol of the tension of the web fed therefrom. gt urther object is theprovision of a web roll braking mechanism in which one of the brakemembers, is positively.

moved. away from the other, so that the brakes may be completelyreleased. Still another object is the provision of a braking mechanismcontrolled by the tension of the running web which permits widervariations in the braking pressure than the brake mechanisms nowgenerally employed.

In the present embodiment of the invention, the web roll brakingmechanism comprises a pair of pivotally mounted brake shoes coactingwith a brake pulley on the roll shaft, and toggle mechanism forreleasably connecting the brake shoes together at one end and forpositively moving the brake shoes toward and from each other. The togglemechanism is connected to a pilot roller moved by changes in tension ofthe web fed from the web roll. Means are also provided for releasing thetoggle mechanism from one of the brake shoes so that new web rolls maybe easily moved into place, and suitable means are provided for varyingthe normal tension created by the brake mechanism.

It will be understood that the foregoing general description and thefollowing detailed description as well are exemplary and explanatorynrehtioh si t n t e her e her s c r of the invention but are notrestricted thereon.v

Referring now in detail to the drawing show:v ing the present preferredand illustrative em: bhfl rheh o th nve t n, the web roll .1 isrotatahlr su po t usua u n s. o m umrtihe a ke s 2 proj ct n at rallyfrom the side tram-e 3c o t e p inti p ess- Weh o l ha t 4 P e t f r soe ista be nd e i the b a ket and ha mounted th reo a brak hhlle B ake Soe 5 be in a nst the Pulley 5 a e moi a l mo nt d in brake arm 7, '7 voty s hhrt d on a P n 8' pr ec es om one bracket 2 and below the level ofthe roll ha t e thereb fa lit ting t move en o new web rolls into webfeeding position.

M ans a v P de o c rollin the p esur p th a s shoes ee ih -t t bra e u ln ac or a e w th h t n io f th Web t hlm h b .0 to he i ti g ress an thra h e sh w a o v nt na r of pi t oller me ha ism h et 001111693941 with 1 me h m.- e mbs ee, th Pi olle 101s rotatably journalled in endblocks 11 which are slidable between the horizontal guides 12 in bracket1- ex n in at ra l rom t e re s frames 3 at either end of theroller.Pilot roller 9 no m ll held in a ce tra os ion a a ns he tension o th unin w b b mea s 9; springs 14, compressed between the slide blocks 11and the brackets 13.

In passing through the press, the running web 9 passes over a guideroller 15, rotatably mounted at one side of the press frame 3 and thenpasses over guide rollers 16 rotatably mounted at the end of brackets13, the web being looped around the pilot roller 10 between the guideroller 16. The ends of the pilot roller project beyond the slide blocks11 and are received within the slots in the upper end of levers 17 whichlevers are securely fastened to a shaft 18 journalled in brackets 19projecting from the press frame 3.

For operatively connecting the pilot roller to the brake mechanism, alink 21 is pivoted on a laterally projecting arm integral with one ofthe levers 17, and at its lower end, link 21 is provided with a yoke 22in which is slidable a pivot block 23. A toggle lever 24 is pivotallymounted on bracket 2 by means of pivot 25, and one end of lever 24 ispivotally connected to pivot block 23 by pin 26, thereby transmittingmovements of the pilot roller to the lever 24. A pair of links 27 and 28are pivoted to the lever 24 a short distance from the pin 25, and extendin opposite directions, link 28 being permanently pivoted to the outerend of brake arm 7, and lever 24, while link 27 is releasably pivoted tothe outer end of the upper brake arm 7' and permanently pivoted to lever24. For facilitating the release of link 2'7, its upper end is formed asa hook 29 which can be slipped over and held in engagement with the pin30 at the outer end of brake arm '7. This connection between link 27 andbrake arm 7' permits the arm to be easily released and laid back for theinsertion of new web rolls between the brake arms, and at the same timepermits the brake arm to be moved in either direction by the pilotroller.

Means are also provided for varying the normal tension of the web fedfrom the web roll, and for this purpose pivot block 23 is variablypositionable within yoke 22. For this purpose, a hand screw 32 isthreaded in the lower end of yoke 22 and projects inwardly into pivotblock 23, within which its inner end is rotatably mounted and heldagainst axial movement by collar 33." By turning the hand screw 32,block 23 can be variably positioned within its yoke 22, thereby changingthe normal setting of the brake and the brake arms 7 and. 7' moves'these arms exactly in accordance with the movements of the pilotroller, and any abnormal increase in the tension of the web will causethe arms to bemoved positively;

away from and entirely clear of the brake pulley, while a decrease inthe tension of the web will cause the arms to be positively moved withincreased pressure against the pulley. The pres-'- sure of the arms isthus rendered exactly pro-' portional to the movement of the pilotroller,

and a much wider variation in the braking force"; is possible than withthe mechanisms heretofore generally employed. In most of thesemechanisms, there is always a minimum pressure between the brake armsand the brake pulley which can never be released by the pilot roller,but this undesirable condition is completely avoided by the presentinvention.

The invention in its broader aspects is not limited to the specificmechanisms shown and described but departures may be made therefromwithin the scope of the accompanying claims without departing from theprinciples of the invention and without sacrificing its chiefadvantages.

;What I claim is:

1. Web roll controlling mechanism including in combination a brakepulley mounted on a web roll shaft, a pair or brake shoes mounted onpivotedarms and coacting with said pulley to control rotation of the webroll, a pilot roller moved by changes in the tension of the web fed fromthe arms and lever for moving the brake arms toward and from each other.

2. Web roll controlling mechanism including in combination a pilotroller moved by changes in the web tension, a brake pulley mounted on aweb roll shaft, a pair of brake shoes mounted on pivoted arms andc'oacting withsaid pulley to control'rotation of'the web roll, a leverpivotally mounted between the ends of the brake arms and connected tothe pilot roller, links connecting the brake arms and lever forpositively moving thebra'ke arms toward and from each other and meansconnecting said lever and pilot roller for moving said lever inaccordance with changes in web tension.

3. Web roll controlling mechanism including in combination a pilotroller moved by changes in web tension, a brake pulley mounted on a webroll shaft, brake shoes cooperating with said pulley, a series of leversforming a closed figure on which said shoes are mounted, certain of saidlevers being movable to move the brake shoes relatively tosaid pulley,means for supporting said levers on both sides of said pulley and meansconnected with said pilot roller and moved thereby for moving saidlevers.

HARLAND FANKBONER.

